package com.core.redis;

import org.apache.poi.ss.formula.functions.Vlookup;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;

public class RedisClient {
    //服务器IP地址
    private static String ADDR = "127.0.0.1";

    //端口
    private static int PORT = 6379;
    //密码
    private static String AUTH = "oxhide";
    //连接实例的最大连接数
    private static int MAX_ACTIVE = 1024;

    //控制一个pool最多有多少个状态为idle(空闲的)的jedis实例，默认值也是8。
    private static int MAX_IDLE = 200;

    //等待可用连接的最大时间，单位毫秒，默认值为-1，表示永不超时。如果超过等待时间，则直接抛出JedisConnectionException
    private static int MAX_WAIT = 10000;
    //连接超时的时间　　
    private static int TIMEOUT = 10000;

    // 在borrow一个jedis实例时，是否提前进行validate操作；如果为true，则得到的jedis实例均是可用的；
    private static boolean TEST_ON_BORROW = true;

    private static JedisPool jedisPool = null;

    /**
     * 初始化Redis连接池
     */

    static {

        try {


            JedisPoolConfig config = new JedisPoolConfig();
            config.setMaxTotal(MAX_ACTIVE);
            config.setMaxIdle(MAX_IDLE);
            config.setMaxWaitMillis(MAX_WAIT);
            config.setTestOnBorrow(TEST_ON_BORROW);
            jedisPool = new JedisPool(config, ADDR, PORT, TIMEOUT, AUTH);

        } catch (Exception e) {

            e.printStackTrace();
        }

    }

    /**
     * 获取Jedis实例
     */

    public synchronized static Jedis getJedis() {

        try {

            if (jedisPool != null) {
                Jedis resource = jedisPool.getResource();
                return resource;
            } else {
                return null;
            }

        } catch (Exception e) {
            e.printStackTrace();
            return null;
        }

    }

    public static void set(String key, String value) {
        Jedis redis = null;
        try {
            redis = getJedis();
            redis.set(key, value);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            returnResource(redis);
            redis = null;
        }
    }

    public static String get(String key) {
        Jedis redis = null;
        try {
            redis = getJedis();
            return redis.get(key);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            returnResource(redis);
            redis = null;
        }
        return null;
    }

    /***
     *
     * 释放资源
     */

    public static void returnResource(Jedis jedis) {

        if (jedis != null) {
            jedisPool.returnResource(jedis);
        }

    }

    public static void main(String[] args) {
        Jedis redis = RedisClient.getJedis();
        redis.set("a", "你好");
        System.out.println(redis.get("a"));
    }
}
